JP2000015485A - Double-acting forming device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a double-acting forming device which is high in accuracy, ready for the installation space and clean working environment, capable of suppressing the vibration and noise, sure in positioning when a forming head is operated at high speed, and ready for the working of a small and precise parts requiring the deep drawing and trim-drawing. SOLUTION: A linear motor 8 and a linear guide 12 are provided opposite to each other between a casing 7 to be held between right and left frames 3, 4 erected on a base 2 and an outer forming head 6 provided inside the casing, and a linear motor 13 and a linear guide 14 are provided opposite to each other between the outer forming head 6 and an inner forming head 5 provided inside thereof to constitute a double-acting forming device 1 so that the magnetic attraction force between the linear motors 8 opposite to the outer forming head 6 and the inner forming head 5 is canceled, and the magnetic attraction of the linear motor is not applied to the linear guide 12.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a molding apparatus which is required to have a light load, a high precision positioning accuracy, a clean working environment and a small space for a line installation in the field of press working. In particular, the present invention relates to a double-acting forming apparatus for processing small precision parts requiring deep drawing and drawing.

[0002]

2. Description of the Related Art Conventionally, a molding apparatus for processing small precision parts requiring a small load and high positioning accuracy is a mechanical press such as a crank press using a crank mechanism or a hydraulic press. Is generally used. In addition, there has been provided a molding apparatus that raises and lowers a slide by a screw mechanism using an AC servomotor as a driving source.

However, in the crank press, there is a problem that the position accuracy of the bottom dead center of the slide is not stabilized due to thermal displacement or the like. In the hydraulic press, the use of oil reduces the clean space including the installation space of the hydraulic unit and noise. There is a problem that it cannot cope with a difficult working environment. Further, a molding apparatus using an AC servomotor as a drive source has problems in high-speed positioning accuracy, work efficiency, and the like. Against this background, molding equipment using linear motors has been developed, taking advantage of the characteristics of linear motors, which can perform high-speed, stable, high-precision positioning and can efficiently transmit power with short acceleration / deceleration times. ing.

[0004]

In a molding apparatus using a linear motor, a guide acts to guide the ascent and descent of the molding head by the magnetic attraction force of the linear motor due to the relationship between the linear motor and the mounting position of the guide. The gap between the movable slider and the magnet plate that constitutes the motor changes, and the thrust of the linear motor becomes unstable or the guide device changes, increasing the frictional resistance and allowing the molding head to move up and down smoothly. There are problems such as not. In addition, products produced by deep drawing or punching may require a material presser for the upper die in addition to the forming punch, which requires a double-acting pressure head. ing.

SUMMARY OF THE INVENTION It is an object of the present invention to solve the above-mentioned problems, to provide a high-precision mounting position and a clean working environment without being affected by the positional accuracy of the bottom dead center of a molding head due to thermal displacement or the like. To provide a double-acting molding machine that suppresses noise and vibration, ensures the positioning of the molding head during high-speed operation, and can also process small precision parts that require deep drawing or drawing. is there.

[0006]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides an outer molding head and an inner molding head provided inside the outer molding head with the outer molding head as an outer shell. In a double-acting molding apparatus that raises and lowers a head and an inner molding head with an arbitrary phase difference, a stroke length, and an elevating speed, the outer molding head includes a frame side of the double-acting molding apparatus as a first movable slider, At least two sets of first linear motors, each of which is configured as a first magnet plate, are opposed to each other with the outer molding head interposed therebetween, or the frame side is a second magnet plate, and the outer wall side of the outer molding head is a second movable slider. At least two sets of second linear motors are fixedly opposed to each other with the outer forming head interposed therebetween, and the magnetic attraction force between the opposed linear motors is fixed. A guide device that guides the up and down movement of the outer molding head in the vertical direction perpendicular to the magnetic attraction between the linear motors is provided so that the magnetic attraction of the linear motor does not act on the guide. I do.

The guide device for guiding the elevation of the outer molding head is a linear roller guide composed of a roller unit and a guide rail, the frame side being a first roller unit, and the outer wall side of the outer molding head being a first guide rail. At least two sets of first linear roller guides are fixedly opposed to each other with the outer forming head interposed therebetween, or a second linear unit having the frame side as a second guide rail and the outer wall side of the outer forming head as a second roller unit. At least two sets of roller guides are fixedly opposed to each other with the outer forming head interposed therebetween.

[0008] Also, at least one inner forming head is provided inside the outer forming head, and a third linear slider having an inner wall side of the outer forming head as a third movable slider and an outer wall side of the inner forming head as a third magnet plate. A fourth linear motor in which at least two sets of motors are fixedly opposed to each other with the inner forming head interposed therebetween, or the inner wall side of the outer forming head is a fourth magnet plate and the outer wall side of the inner forming head is a fourth movable slider. At least two sets are fixedly opposed to each other with the inner forming head interposed therebetween to cancel the magnetic attraction between the opposed linear motors and to move the inner in the vertical direction perpendicular to the magnetic attraction between the linear motors. A guide device for guiding the ascending and descending of the forming head is provided so that the magnetic attraction of the linear motor does not act on the guide device.

The guide device for guiding the elevation of the inner forming head is a linear roller guide comprising a roller unit and a guide rail. The inner roller side of the outer forming head is a third roller unit, and the outer wall side of the inner forming head is the third roller unit. At least two sets of third linear roller guides configured as guide rails are fixedly opposed to each other across the inner forming head, or the inner wall side of the outer forming head is the fourth guide rail and the outer wall side of the inner forming head is the fourth guide rail. At least two sets of fourth linear roller guides configured as roller units are fixedly opposed to each other across the inner forming head. As described above, the double-acting molding apparatus is configured.

Alternatively, at least one inner molding head provided inside the outer molding head is provided on the outer molding head, with the outer molding head which is guided by the linear roller guide constructed as described above and which raises and lowers the outer molding head as an outer shell. A double-acting molding apparatus is constituted by an internal hydraulic cylinder or pneumatic cylinder and at least one inner head fixed to the tip of a piston rod of the cylinder.

[0011]

1 to 7 show an embodiment of a molding apparatus according to the present invention. 1 to 4 show a first embodiment of the present invention. As shown in FIG. 1 to FIG.
A left frame 3 and a right frame 4 are integrally formed with the base 2 on a base 2 on which a lower die (not shown) is mounted, and an upper die (not shown) is provided between the left frame 3 and the right frame 4. And a casing 7 provided with an outer molding head 6 and an inner molding head 5 provided inside the outer molding head 6.

On the left inner surface and the right inner surface of the casing 7,
The movable sliders 8A, 8A are fixed,
Magnet plates 8B and 8B that engage with the respective movable sliders 8A and 8A provided on the casing 7 are fixed to the left side surface and the right side portion of the outer molding head 6 provided inside the casing 7 in opposition to A and 8A. Thus, the linear motors 8 and 8 are configured.

As shown in FIG. 4, the linear motor 8 generates a magnetic field by forming a movable slider 8A in which a coil winding (9) and its cooling part are integrated, and N and S poles of a permanent magnet. The thrust is continuously formed by controlling and synchronizing the phase of the current of the coil 9 in accordance with the position of the magnetic pole of the movable slider 8A facing the coil 9 by forming the two basic portions of the magnet plate 8B via a gap. obtain. Inside the movable slider 8A, a forced cooling pipe (not shown) is embedded very close to the coil winding (9), which is a heat source, and is connected to a connection port 10 provided at the tip of the movable slider 8A. Cooled by a cooling liquid supplied from a cooling device (not shown) via the pipe 11, heat can be efficiently discharged to the outside. This minimizes the influence of the heat generated by the linear motor 8 on the double-acting molding device (1). The cooling of the linear motor 8 may be performed by an air cooling system.

On the front inner surface and the rear inner surface of the casing 7,
The roller units 12A, 12A are fixedly mounted, and the front and rear surfaces of the outer forming head 6 are opposed to the roller units 12A, 12A, and the guide rails engage with the respective roller units 12A, 12A provided on the casing 7. 12
B, 12B are fixedly provided, and constitute the linear guides 12, 12.

Movable sliders 13A, 13A are fixed to the left inner surface portion and the right inner surface portion of the outer forming head 6, and the inner forming head 5 provided in the outer forming head 6 in opposition to the movable sliders 13A, 13A. Each of the movable sliders 1 provided on the outer molding head 6 is provided on a left side surface portion and a right side surface portion.
Magnet plates 13B, 13B engaged with 3A, 13A are fixedly provided, and constitute linear motors 13, 13.

Roller units 14A, 14A are fixed to the front inner surface and the rear inner surface of the outer forming head 6, and the front and rear surfaces of the inner forming head 5 are opposed to the roller units 14A, 14A. Guide rails 14B, 14B engaged with the respective roller units 14A, 14A provided on the outer forming head 6 are fixedly provided, and the linear guides 14,
14.

The movable sliders 8 and 13 of the linear motors are provided within the stroke lengths S1 and S2 of the inner and outer forming heads 5 and 6 and the upper dead center and the lower dead center which are preset in a control device (not shown). 8A, 13
A coil (9, 9) is energized, and the inner forming head 5 and the outer forming head 6 move up and down with an arbitrary phase difference and stroke lengths S1, S2 and an elevating speed by the thrust of the linear motors 8, 13. The lower die (not shown) attached to the base 2 and the upper die (not shown) attached to the outer molding head 6 allow the supplied material to be pressed into small precision parts that require deep drawing or drawing. Done.

As described above, each of the linear motors 13, with the inner forming head 5 and the outer forming head 6 interposed therebetween,
By providing 13, 8, 8 in opposition, the magnetic attraction between the opposing linear motors 13, 13, 8, 8 is canceled out, and the vertical movement of the inner forming head 5 and the outer forming head 6 can be smoothly performed. It becomes possible. At the same time, the linear roller guides 14, 14 as guide devices are directed toward the mounting position of the linear motors 13, 8 in other words, the vertical direction perpendicular to the direction of the magnetic attraction force between the linear motors 13, 13, 8, 8. , 12 and 12, the magnetic attraction force of the linear motors 13 and 8 does not act on the linear roller guides 14 and 12, and stable bottom dead center position accuracy can be obtained.

In the first embodiment, in the outer forming head, the movable slider 8A is fixedly mounted on the casing 7 side, and the magnet plate 8B is fixedly mounted on the outer forming head 6 side to form the linear motor 8. In the head 5, the movable slider 13A is fixed to the outer forming head 6 side and the magnet plate 13B is fixed to the inner forming head 5 side to form the linear motor 13. The movable sliders 8A, 13A and the magnet plates 8B, 13B are respectively provided. Are fixed in reverse order, and the linear motors 8, 1
3 may be configured. Similarly, in the outer forming head, the roller unit 12A is fixed to the casing 7 side, and the guide rail 12B is fixed to the outer forming head 6 side to form the linear guide 12. In the inner forming head 5, the linear guide 12 is formed. And the guide rail 14B is fixed to the inner forming head 5 side to form the linear guide 14. However, the roller units 12A and 14A and the guide rails 12B and 14B are fixed in reverse to each other to form the linear guide. Guides 12 and 14 may be configured.

FIG. 5 shows a second embodiment of the present invention. FIG.
As shown in FIG.
This is an example in which the configuration of the outer molding head 26 is the same as that of the first embodiment, and four inner molding heads 25 provided inside the outer molding head 26 are provided. The inside of the outer molding head 26 includes left and right partition plates 26A and front and rear partition plates 26A.
B separates into four rooms, and an inner forming head 25 provided for each room is associated with a linear motor 23 and a linear guide 24 which are arranged similarly to the inner forming head (5) of the first embodiment described above. At the same time, they move up or down simultaneously or with an arbitrary phase difference, stroke length, and up / down speed.

A movable slider 23A is provided on the inner side surface of the outer forming head 26 and the left and right partitioning plates 26A in the partitioned rooms, and a magnet plate 23B provided on the inner forming head 25 is engaged with the movable slider 23A. The linear motor 23 is configured. Further, a roller unit 24A is provided on the inner front and rear surfaces of the outer forming head 26 and the front and rear partitioning plates 26B of the partitioned rooms, and a guide rail 24B provided on the inner forming head 25 is engaged with the roller unit 24A. The linear guide 24 is configured.

The second embodiment is the same as the first embodiment shown in FIGS. 1 to 4 except for the number of mounting bases of the inner molding head 25, and a description thereof will be omitted.

FIGS. 6 to 8 show a third embodiment of the present invention. As shown in FIGS. 6 to 8, in the double-acting molding apparatus 31 according to the third embodiment, the outer molding head 36 has the first configuration.
This is an example in which the inner forming head provided inside the outer forming head 36 is configured as a hydraulic cylinder 35 as in the embodiment. The hydraulic cylinder 35 as the inner forming head switches the supply and discharge of the pressure oil discharged from the pump 39 of the upper chamber 35A and the lower chamber 35B by the servo valve 38, and has an arbitrary phase difference, a stroke length, and an elevating speed. ,
Piston rod 37 provided with inner head 32 at the tip
Up and down. Note that a linear scale 33 is used as the position detecting means in the third embodiment.

The third embodiment is the same as the first embodiment except for the inner molding head.
Description is omitted.

FIGS. 9 and 10 show a fourth embodiment of the present invention. As shown in FIGS. 9 and 10, the double-acting forming apparatus 41 in the fourth embodiment has four hydraulic cylinders 45, which are inner forming heads provided inside the outer forming head 46 in the third embodiment. This is the case in the case. The inside of the outer molding head 46 is partitioned into four rooms by left and right partition plates 46A and front and rear partition plates 46B, and a hydraulic cylinder 45 is provided for each room, and at the same time, or at an arbitrary phase difference, a stroke length, and a vertical movement. The piston rod 47 provided with the inner head 42 at the tip is moved up and down at a speed.

The fourth embodiment is different from the first embodiment and the members other than those relating to the inner forming head, and the third embodiment and the hydraulic cylinder 4 which is the inner forming head.
Except for the number of mounting bases 5, the member configuration is the same, and the description is omitted.

[0027]

As is apparent from the above description, according to the present invention, the positional accuracy of the bottom dead center of the forming head is not affected by thermal displacement or the like, and the installation space and the clean work are high. It is possible to provide a double-acting molding machine that can cope with the environment, can reliably position the molding head at high speed operation while suppressing noise and vibration, and can also process small precision parts that require deep drawing and drawing. . In addition, since synchronous rise and fall of all the molding heads of the inner molding head and the outer molding head and asynchronous rise and fall of each molding head can be set, even for a complicated product, the molding position can be set to any phase difference, stroke length and stroke length. Since molding can be performed at the elevating speed, advanced molding with high added value such as molding of difficult-to-process materials can be performed.

[Brief description of the drawings]

FIG. 1 is a front sectional view of a double-acting molding apparatus according to a first embodiment of the present invention.

FIG. 2 is a side sectional view of the same.

FIG. 3 is also a top sectional view

FIG. 4 is an explanatory diagram of a configuration of a linear motor.

FIG. 5 is a top sectional view of a double-acting molding apparatus according to a second embodiment of the present invention.

FIG. 6 is a front sectional view of a double-acting molding apparatus according to a third embodiment of the present invention.

FIG. 7 is also a top sectional view

FIG. 8 is also a control configuration diagram of a hydraulic cylinder.

FIG. 9 is a front sectional view of a double-acting molding apparatus according to a fourth embodiment of the present invention.

FIG. 10 is also a top sectional view

[Explanation of symbols]

1 is a double-acting molding apparatus, 2 is a base, 3 is a left frame, 4 is a right frame, 5 is an inner molding head, 6 is an outer molding head, 7 is a casing, 8 is a linear motor, 8A is a movable slider, and 8B is Magnet plate, 9 is a coil, 10 is a connection port, 1
1 is a pipe, 12 is a linear guide, 12A is a roller unit, 12B is a guide rail, 13 is a linear motor, 13
A is a movable slider, 13B is a magnet plate, 14 is a linear guide, 14A is a roller unit, 14B is a guide rail,
21 is a double-acting forming device, 22 is a linear guide, 22A is a roller unit, 22B is a guide rail, 23 is a linear motor, 23A is a movable slider, 23B is a magnet plate, 25 is an inner forming head, 26 is an outer forming head, 26A Is a left and right partition plate, 26B is a front and rear partition plate, 31 is a double-acting forming device, 32 is an inner head, 33 is a linear scale,
5 is a hydraulic cylinder, 35A is an upper chamber, 35B is a lower chamber, 36
Is an outer forming head, 37 is a piston rod, 38 is a servo valve, 39 is a hydraulic pump, 41 is a double-acting forming device, 42
Is an inner head, 45 is a hydraulic cylinder, 46 is an outer forming head, 46A is a right and left partition plate, 46B is a front and rear partition plate, and 47 is a piston rod.

Claims (2)

[Claims] 1. An outer molding head, and an inner molding head provided inside the outer molding head with the outer molding head as an outer shell, wherein the outer molding head and the inner molding head are provided with an arbitrary phase difference, a stroke length, and an elevating speed. (A) The outer forming head includes a first linear motor having a frame side of the double acting forming apparatus as a first movable slider and an outer wall side of the outer forming head as a first magnet plate. At least two sets facing each other across the outer molding head are fixed or
Alternatively, at least two sets of second linear motors each having the frame side as the second magnet plate and the outer wall side of the outer molding head as the second movable slider are fixedly opposed to each other with the outer molding head interposed therebetween, and the opposed linear motors are fixed. The magnetic attraction force of the linear motor is offset, and a guide device for guiding the elevation of the outer forming head in a vertical direction perpendicular to the magnetic attraction force between the linear motors is provided. It is configured not to work. (B) The guide device for guiding the elevation of the outer molding head is a linear roller guide composed of a roller unit and a guide rail, the frame side being a first roller unit, and the outer wall side of the outer molding head being a first guide rail. At least two sets of the first linear roller guides to be configured are fixedly opposed to each other with the outer forming head interposed therebetween, or the frame side is a second guide rail, and the outer wall side of the outer forming head is a second roller unit. At least two sets of linear roller guides are fixedly opposed to each other with the outer forming head interposed therebetween. (C) A third inner forming head is provided inside the outer forming head, and the inner wall side of the outer forming head is configured as a third movable slider, and the outer wall side of the inner forming head is configured as a third magnet plate. A fourth linear motor in which at least two sets of linear motors are fixedly opposed to each other with the inner forming head interposed therebetween, or the inner wall side of the outer forming head is a fourth magnet plate and the outer wall side of the inner forming head is a fourth movable slider. At least two sets of motors are fixedly opposed to each other with the inner forming head interposed therebetween, to offset the magnetic attraction between the opposed linear motors and to be directed vertically in a direction perpendicular to the magnetic attraction between the linear motors. A guide device that guides the elevation of the inner forming head is provided so that the magnetic attraction force of the linear motor does not act on the guide device. (D) The guide device for guiding the elevation of the inner forming head is as follows:
A linear roller guide composed of a roller unit and a guide rail is sandwiched between the inner molding head and a third linear roller guide composed of a third roller unit on the inner wall side of the outer molding head and a third guide rail on the outer wall side of the inner molding head. At least two pairs are fixedly opposed to each other, or a fourth linear roller guide that configures the inner wall side of the outer forming head as a fourth guide rail and the outer wall side of the inner forming head as a fourth roller unit sandwiches the inner forming head. At least two sets are fixedly opposed to each other. A double-acting molding apparatus characterized by the above. 2. An outer molding head, and an inner molding head provided inside the outer molding head with the outer molding head as an outer shell, wherein the outer molding head and the inner molding head are provided with an arbitrary phase difference, a stroke length, and a lifting / lowering speed. (A) The outer forming head includes a first linear motor having a frame side of the double acting forming apparatus as a first movable slider and an outer wall side of the outer forming head as a first magnet plate. At least two sets facing each other across the outer molding head are fixed or
Alternatively, at least two sets of second linear motors each having the frame side as the second magnet plate and the outer wall side of the outer molding head as the second movable slider are fixedly opposed to each other with the outer molding head interposed therebetween, and the opposed linear motors are fixed. The magnetic attraction force of the linear motor is offset, and a guide device for guiding the elevation of the outer forming head in a vertical direction perpendicular to the magnetic attraction force between the linear motors is provided. It is configured not to work. (B) The guide device for guiding the elevation of the outer molding head is a linear roller guide composed of a roller unit and a guide rail, the frame side is a first roller unit, and the outer wall side of the outer molding head is a first guide rail. At least two sets of the first linear roller guides to be configured are fixedly opposed to each other with the outer forming head interposed therebetween, or the frame side is a second guide rail, and the outer wall side of the outer forming head is a second roller unit. At least two sets of linear roller guides are fixedly opposed to each other with the outer forming head interposed therebetween. (C) The inner forming head includes at least one hydraulic cylinder or pneumatic cylinder internally provided in the outer forming head, and at least one inner head fixed to the tip of the piston rod of the cylinder. Constitute. A double-acting molding apparatus characterized by the above.